Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
þumall
→
Icelandic
þumalfingur
(mention)
→
Icelandic
þumalputti
(compound)
→
Icelandic
Þumalína
(suffix)